Infertility and spontaneous abortion increase with age primarily due to
A) uterine fibroids.
B) endometriosis.
C) highly acidic or basic vaginal secretions.
D) higher production of oocytes with abnormal chromosome numbers.
D) higher production of oocytes with abnormal chromosome numbers.
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Gene therapy can best be described as the ____
a. repair of a defect (mutation) in a gene b. insertion of normal genes to act in place of mutant genes c. insertion of human genes into other organisms d. cloning of genes to produce and purify therapeutically useful proteins e. mapping of all human genetic information
Organisms that depend on the energy stored in chemical bonds by other organisms for their food energy are called ________.
A. Chemotrophs B. Autotrophs C. Oligotrophs D. Heterotrophs
CRISPR is used for:
A) post-transcriptional control. B) manipulation of protein folding. C) gene editing. D) RNA editing. E) drug delivery.
Which is not used as a chemical preservative in food?
A. Iodine B. Sulfite C. Salt D. Organic acids E. Ethylene oxide